J Knee Surg 2015; 28(01): 089-094
DOI: 10.1055/s-0034-1371770
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Preoperative Measurement of ACL Insertion Sites

Authors

  • Randy Schwartzberg

    1   Department of Orthopaedics, Orlando Orthopaedic Center, Orlando, Florida
  • Kevin Snyder

    2   Department of Radiology, Center for Diagnostic Imaging, Winter Park, Florida
  • Bryan Reuss

    1   Department of Orthopaedics, Orlando Orthopaedic Center, Orlando, Florida
Further Information

Publication History

08 August 2013

18 January 2014

Publication Date:
12 March 2014 (online)

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Abstract

This study was designed to evaluate preoperative predictions of the femoral and tibial ACL insertion lengths. Intraoperative measurements were made of the femoral and tibial ACL insertion lengths with an arthroscopic ruler. A musculoskeletal radiologist and a sports medicine orthopedic surgeon measured the ACL insertions from preoperative magnetic resonance imagings (MRIs) in a blinded fashion. Correlations between height, weight, body mass index, and gender with intraoperative ACL insertion length measures were also evaluated. Patient height and male gender demonstrated strong correlations with intraoperative ACL insertion measures. A moderate correlation was seen between patient weight and intraoperative ACL insertion measures. When evaluating the frequency with which the raters' respective MRI measures were exactly the same as the intraoperative measures, moderate correlations were seen. The radiologist and orthopedic surgeons' MRI measures were within 3 mm of the intraoperative measures 98 and 75% of the time, respectively, for the femur and 92 and 83% of the time, respectively, for the tibia. This study concludes that preoperative MRI measures of ACL insertion lengths can be used to predict intraoperative ACL insertion lengths. Also, it is expected that taller patients and male patients should have greater ACL insertion lengths seen arthroscopically.